Tjpsettiktg tires



UNITED STATES PATENT OEETCE.

ROCKWELL HAZEN AND YOLNEY GIBBS, OF HOMER, MICHIGAN.

UPSETTING- TIRES.

Specification of Letters Patent No. 17,738. dated July 7, 1857.

To all whom it may concern.'

Be it known that we, RooKwELL HAZEN and VoLNEY GIBBs, of Horner, in thecountyT of Calhoun and State of Michigan, have invented a new andlmproved Device for Upsetting Circular Bars of lron, as Wheel- Tires,and also for Upsetting Straight Bars; and we do hereby declare that thefollowing is a full, clear, and exact description of the same, referencebeing had to the annexed drawings, making a part of this specification,in which- Figure 1 is a longitudinal vertical section of our improvement(x), (x), Fig. 3, showing the plane of section. Fig. 2 is a transversevertical section of ditto (y), (y), Fig. 3, indicating the plane ofsection. Eig. 3 is a plan or top view of ditto.

Similar letters of reference indicate corresponding parts in the severalfigures.

Our invention consists in the employment or use of two jaws and a clamp,arranged and operated as will be hereinafter fully shown and described,whereby the iron bars may be upset in an expeditious and perfect manner.

The invention is particularly applicable to the upsetting of tire forwheels, whereby the same may, when of too great diameter, be shortenedwithout cutting and rewelding.

To enable those skilled in the art to fully understand and construct ourinvention, we will proceed to describe it. j

A represents a fiat bed or plate, which may be constructed of cast-ironand supported a suitable height by pedestals (a).

On the upper surface of the plate A, guides (b) are placed, betweenwhich ledges on the underside of blocks B, B, are fitted and allowed toslide freely. To the back sides of the blocks B, B, inclined obliqueprojecting ledges (d), are formed. These edges extend from the top tothe bottom of the blocks and are tted in oblique grooves (e), which aremade in a sliding late C, which is operated or moved up and own by meansof a screw D, the lower end of which passes through a projection on thelower end of the sliding plate. The upper part of the screw passesthrough the center of a curved bar E, which has a screw-thread cut onit, in which the screw D works.

F represents a plate which is attached permanently to the bed A. Thisplate has a slot (g), made longitudinally through it, and a head G isplaced on this plate, the lower end of the head having a tenon on it,which tenon is tted in the slot (g). The head G is allowed to slidefreely on the plate F and is moved back and forth by a screw H, whichpasses through an upright (h), attached permanently to the plate F. Theinner side of the head G has a vertical dovetail projection (t) on it,and a curved plate l is secured to the head G by having ledges (j)formed on the back side of said plate; the dove-tail projection beingfitted between the ledges, which form a dove-tail recess.

To the ends of the plate F and directly between the two blocks B, B, anupright (lc), is secured. This upright has a vertical dovetailprojection (Z), on it, and a curved late J is fitted or secured to saidupright by iaving ledges or cleats (m) attached to or formed on the backside of said plate J. The

late J is curved so as to correspond enltirely with the plate l, asplainly shown in The blocks B B are attached to or formed on horizontalplates (a), which are in the same plane with the plate F. These plates(n), are slotted longitudinally .as shown at (0); three parallel slotsare shown in each plate but more or less may be employed as desired. Inthe outermost slot of each plate (n), two upright heads K, K, arefitted. The inner sides of these heads are grooved vertically and awedge L, is fitted in the grooves between the two heads on each plate(n). The innermost head K, on each plate (n), has a vertical knife or asharp-edged jaw (p), attached, and a corres onding knife or jaw (g) isplaced on each b ook B, near its outer end. These knives or jaws arefitted in dove-tail grooves formed in the blocks and heads so that theycan readily be removed when necessary. It will be seen by referring toFig. 3, that knives or jaws (q), are placed on the jaws B, B, directlyopposite to the knives or jaws (p).

The operation is as follows: Suppose a tire is to be u set. The thinnestportion of the tire whiclli is shown in red Eig. 3, is heated and placedbetween the two curved plates l, J, the heated portion being at thecenters of the plates. Ihe plate I is then moved up to the tire arequisite distance by turning the screw H. The wed es L, are then drivendownward and the ves or jaws (f p) are forced toward the tire, and bothknives (p), (g), are forced into the tire. These knives serve as clampsor jaws, and they are beveled on their outer sides only.

The blocks B, B, previously to the clamping of the tire are distended orforced outward by depressing or forcing down the plate C, by turning thescrew D; and when the tire is clamped by the knives or jaws (p), (g),the blocks Vare forced together by raising the plate C; the blocks beingmoved as described in consequence of the oblique projections (d) fittingin the oblique recesses or'grooves (e), in the plate C. As the blocks B,B, are

forced together or toward each other, theA Vplacing the heads K, in theinner slots (o),

short bars may be upset. I

We do not claim upsetting iron tire, or other bars, or rods, by means ofsliding blocks B, B, which are made to move toward and from each other,the blocks being so connected with the tire, rod, or bar, as to upset orcontract it as they are forced toward each other; for blocks thusoperated have been previously used on what is known as R. W. GatesMachine. In this machine, however, the sliding blocks are actuateddirectly by a right and left screw, and the objection to this mode ofoperating the blocks is this: If the threads of the screw are made fine,to economize power,

they will soon "stripf or wear out, on account of thepressure or strainto which they are subjected while upsetting the iron; and if the threadsbe made sufficiently coarse to render the screw durable, great power isrequired to operate the machine. In our improvement the power of thescrew D, being transmitted to the blocks B, B, through the medium of theoblique ledges (d) and groove (e), the thread of the screw may be madeof any proper size and the speed of the blocks regulated as desired, bygiving the ledges (d) and grooves (e) a greater or less inclinationcommensurate with the power required, and the required strength of thescrew, D.

Having thus described our invention, what we claim as new, and desire tosecure by Letters Patent, is:

The sliding blocks B, B, with knives (p), (il), attached, and the headsL, L, tted in s ot's in the plates (n), to which the blocks B, areattached the inner blocks (lc), having knives (p) attached, which knivesare actuated by the wedges L; the above arts being used in connectionwith the p ates l, J, and the whole combined and arranged as described,for the purpose set forth. It being understood that we do not claimseparately either of the parts described, but the whole when arranged tooperate conjointly as specified.

RocKwELL HAZEN. voLNnY enses.

Witnesses:

C. W. STRONG, P. S. WILSON.

